Hello,
It seems to be the case of OCD but before making a proper diagnosis a visit to Clinical Psychologist is important so that everything is taken into account. OCD generally is not a condition that will not go away without treatment. Gradually try to normalise daily household routine, like you said you have encouraged her to give up on one urge each day with it you also have to search some distraction techniques so that when there is an urge she is able to engage her mind somewhere else. For example: talking to someone she loves, chanting or watching certain positive videos. Psychoeducate her about this disorder and how seeking treatment can help her.
Next Steps
Encourage her to consult a clinical Psychologist for CBT
Health Tips
Use distraction techniques and motivate her